Abstract
The Pulsed Resonant Charge Extractor (PSCE) chip has been characterized thoroughly in order to verify the theoretical discussion of the operation principle. This chapter shows the corresponding measurement results, which have been gained using real piezoelectric energy harvesters under laboratory conditions. A laboratory shaker table has been used as a vibration source, in order to guarantee reproducible measurement conditions. After the corresponding setup has been explained, the two piezoelectric energy harvesters used as a power source are characterized with respect to different load circuits, and the procedure of extracting the values of the electrical equivalent circuit parameters is explained step by step. Then, a demonstration platform showing the effectiveness of the PSCE chip by means of a blinking light emitting diode (LED) is described. The main focus of this chapter is the performance analysis of the PSCE chip, describing in detail how the output power and the overall chip losses can be measured. Simulations are used to extensively analyze the different loss mechanisms within the chip. After that, the operation limits of the PSCE chip are discussed, ending up with the conclusion that the presented chip can be used universally in a wide range of environment conditions. The chapter ends with an analysis of the cold-startup capability.
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Notes
- 1.
As discussed in Sect. 6.2.4.1, due to the different shapes of the frequency curves as a result from the nonlinearity of the piezoelectric harvester, it is evident that different frequencies are required in measurement and simulation to achieve the respective excitation levels. For the off-resonant and far off-resonant excitation level, the frequency has been set such that the open circuit voltage amplitude matches between simulation and measurement.
- 2.
The minimum shaker acceleration values are indicated only for information, in order to give a feeling of the values necessary in real applications—as stated before, the different excitation levels are achieved varying the excitation frequency, maintaining a constant vibration amplitude.
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Hehn, T., Manoli, Y. (2015). Performance Analysis of the PSCE Chip. In: CMOS Circuits for Piezoelectric Energy Harvesters. Springer Series in Advanced Microelectronics, vol 38. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9288-2_6
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